Grinding and polishing wheel.



Patented Oct. '8'. IQDI.

D. B. HYDE. GRINDING AND POLISHING WHEEL.

(Application filed .Apr. 4, 1901.)

. (No Model.)

Mfr/5555:

UNITED STATES PATENT OFFICE.

DAVID B. HYDE, OF SPRINGFIELD, OI'IIO.

GRINDING AND POLISHING WHEEL.

SPECIFICATION formingpart of Letters Patent No. 683,942, hated October8, ieoi. gate... filed April 4, 1901. Serial. No. 55257. m. model.)

To all whom it may concern:

Be it known that I, DAVID B. HYDE, a citizen of the United States,residing at Springfield, in the county of Clark and State of Ohio, haveinvented certain new and useful Improvements 'in Grinding and PolishingWheels, of which the followingis a specification, reference being badtherein to the accompanying drawings.

This invention relates to grinding and polishing-wheels and is in thenature of an improvement upon the construction set forth in theapplication filed 'by me June 11, 1900, Serial No. 19,800.

The object of the present invention is to provide a firm and uniformgripping of the wheel by the clamping-plates; and to these ends theinvention consists in certain novel features, which I will now proceedto describe and will then particularly point out the claim.

. each clamping-plate.

In the accompanyingdrawings, Figure 1 is a central sectional view of astructure embodying my invention in one'form. Fig. 2 is a View of theinner face of one of the clamping-plates, and Fig. 3 is a detail view ofa modified form of the teeth or serrations.

In my prior application above referred to I have described a grindingand polishing wheel comprising a wheel proper having its sidesconverging toward'its outer periphery, the same being held in positionon the mandrel byapair of clamping-plates having their inner facesconcave to engage with said wheel on opposite sides thereof and providedwith teeth or serrations formed on said plates adjacent to said wheel.In the construction therein set forth these teeth or serrations areshown as being uniformly and equidis'tantly distributed over the entireinner surface of I have found in practice that it is advantageous toarrange the teeth or serrations in groups separated by interveningspaces, there resulting from this arrangement two advantages-first, thatthe number of teeth being reduced the amount of pressure on eachindividual tooth is correspondingly increased, and the bite or holdthereof is consequently improved, and, sec-' ond, that the interveningspaces not provided with teeth serve to give a greater measure ofaccommodation for inequalities on the clamping-surfaces of thegrinding-wheel.

In carrying out my invention Ihave shown a grinding-wheel 1, which maybeof any suitable material and which is so constructed that its sidesconverge toward its outer pe-, riphory. This wheel is provided with theusual opening 2 to receive the mandrel or spin dle 3, said opening beingprovided with a filling 4. of lead or the likein the usual manner, andthe spindle being provided with a fixed collar 5, movable collar 6, andclamping-nut 7 or any other suitable means for tightening up the clampin g-plates. The clamping-plates are indicated at 8 and are concave ontheir inner faces to fit the tapering wheel. The

inner face of each disk is provided with annular groups 9, composed ofteeth or serrations 10, the spaces 11 being not provided with teeth.These annular groups may be of any suitable number, and the number ofteeth or serrations in each group may be varied. It will be noted thatthe omission of teeth at the blank spaces so reduces the number of teethor serrations 011 each disk that when a given pressure is applied to theclampheld and the device as a whole is rendered more effective. v

In Fig. l of the drawings I have shown teeth the sides of which areinclined at equal angles to the surface of the wheel with which theycontact. This construction may, however, be modified, and in Fig. 3 Ihave shown a construction in which teeth are employed whereof thosefaces which are nearest the spindle are substantially perpendicular tothe surface of the wheel.

teeth may be otherwise varied, and the de- The form of the tails ofconstruction hereinbefore set forth inay be modified, and I therefore donot wish to be understood as limiting myself to the precise constructionhereinbefore described,

.5 and shown in the accompanying drawings.

Having thus fully described my invention, What I claim as new, anddesire to secure by Letters Patent, is-

In a grinding and polishing wheel, the com- 10 bination, with a wheelproper having its sides converging toward its outer periphery, of a pairof clampingplates having their inner faces concave for engaging withsaid Wheel proper on opposite sides thereof, said inner faces beingprovided with annular groups of teeth or serrations formed on saidclampingplates adjacent to said wheel proper and with intermediate blankor toothless spaces, sub stantially as described.

In testimony whereof I affix my signature 20 in presence of twowitnesses.

DAVID B. I-IYDE.

\Vitnesses:

E. O. HAGAN, IRVINE MILLER.

